Cool air hold more/less water vapour than warm air.
less
What is the difference between sleet and snow?
Sleet is a mixture of rain and snow and occurs when falling raindrops freeze. Snow occurs when water vapour turns into ice at a temperature below freezing.
Measured in degrees celsius. Causes of variation: amount of sunlight, latitude, altitude, distance from oceans
temperature
measures wind direction
wind vane
measured in millimetres (mm) or litres per square metre. Causes of variation: the Earth's water cycle
precipitation
Weather or climate? It's hot and dry in the summer.
climate
What 4 factors influence climate?
latitude, altitude, distance from the ocean, relief and winds
The natural changes in the atmosphere in a certain place over a short period of time (a day or a week)
weather
Shows the temperature and precipitation in a place during one year
climate graph
Water vapour expands/condenses when it cools.
condenses
The general weather conditions in a certain place over a long period of time (years or decades)
climate
give us information about the weather conditions now or in the future in a particular place
weather map
instrument of temperature
thermometer
Weather or climate? It's cold and windy today.
weather
measured in percentage (%) of water vapour in the air. Causes of variation: air temperature; warm air holds more moisture than cold air
humidity
Weather or climate? It always snows in January.
climate
The droplets form clouds/dust.
clouds
Weather or climate? It's going to rain tomorrow.
weather
instrument of air pressure
barometer
instrument of precipitation
rain gauge
instrument of humidity
hygrometer
measured in milibars. Causes of variation: altitude: the higher the altitude, the lower the pressure.
air pressure
measures wind speed
anemometer
Warm air rises/falls.
rises
measured in kilometres per hour (km/h). Causes of variation: hot air rises and is replaced by cold air. Air movement causes this
wind
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